Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
(592 reviews)
Price: $33.50
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- Reviews (592)
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- Videos (6)
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Tow Ready Trailer Wiring - 30717
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug and Lead
- 0 - 5 Feet Long
- 4 Flat
- Tow Ready
- Adapter converts from 4 pole wiring on vehicle to 7 pole round plug
- Additional wire leads for brake, power and accessory are 12" long
- Mounting bracket (18138) is sold separately
20321 Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
California residents: click here
Video of Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Tow Ready Wiring - Wiring Adapters - 30717 Review
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- Product did not meet expectations
Customer Reviews
Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector - 30717
Average Customer Rating: 4.8 out of 5 stars (592 Customer Reviews)
by: Bruce03/22/2022
i had to replace these two items as my dear daughter went down our goat path driveway too fast. they replaced the originals from etrailer from the prior year. shipping is timely and customer service actually helps! i wired from battery to controller to hitch myself, and everything fit.
by: James H. Miller06/02/2017
This product works as expected. There is not too much to the installation, just plug it in properly and mount the ground wire.
I did not find an easy way to mount this to my wife's Odyssey, or to the trailer hitch (item# 75270). Luckily, I do prototype design and manufacturing. So I came up with my own solution. I designed and made my own bracket to mount the 7 pole to the trailer hitch. It works like a charm, and looks great!
by: Chris03/21/2019
I was really skeptical about this adapter but for no reason! Installed in about 10 minutes using etrailer mounting bracket, dielectric grease, a couple zip ties, and some electric tape. Worked perfectly the first time I tested it on my trailer.
by: roberto03/05/2013
this connector along with the short L bracket and the mount bracket- gave me a nice connector to my hitch.
Though I used the short connector and did have to slightly bend it to allow the 4 to 7 pole connector to fit.
If Id bought the long L bracket-- It could have worked-- but bending a little worked well.
by: Zach O02/03/2017
Works great. Easy install.
It's more sensitive to dirt than I expected, but that might be common to all trailer connections, I don't know. I noticed on a trip that my brake controller said NC (no connection), and I didn't have trailer brakes, which meant my blinkers probably hadn't been working, either. I got pretty worried, and looked at it and only saw just a little black gunk on one blade. But cleaning that small amount of black gunk off solved the problem.
So far, so good!
Laura E.
2/10/2017
Thanks for your business and your review, Zach! Using dielectric grease like 11755 on your connections increases reliability and the life of the connection by preventing corrosion and sealing the connection.
Helpful Links
by: James 01/22/2022
Joe at etrailer was able to provide this solution and saved me literally hundreds of dollars to have a reputable place put in a new harness onto my AWD MKX. Thank you!
James
1/23/2023
The adapter worked out perfectly. And now after almost a year no issues whatsoever.
by: Cory B10/01/2013
This 7 point harness wired right in with my T1 connector and is great for hooking up to my camper, very easy to install!
by: SAS LTD12/23/2022
The staff is very friendly. I would have awarded 5 stars but there was a shipping issue. They did get me all the parts I ordered, with simple communication, a couple pictures and minimal frustrations I got everything over two shipments. It took a little longer to get everything then anticipated. They deserve 4.5 stars not just a 4. I will do business with them again and I do recommend them. Will be ordering a receiver hitch through them this spring.
by: Marty Klemm06/24/2014
There was no splicing wires, it was plug-and-play, highly recommended, very easy installation
by: Laura 03/05/2023
Works great! Remember to ground it to: 1) tow vehicle frame, or 2) directly to tow vehicle negative terminal. Do not ground it trailer frame because you need to complete the circuit to the tow vehicle battery.
by: Darrell08/12/2018
I wanted to show the custom installation. I did not want it under the bumper
by: Raymond 01/12/2023
Wiring harnesses will simplify the job I'm doing glad that I found these products and I also had a good experience dealing with etrailer they keep you informed about shipping and the products are ship fast. Thank you
by: Carl m01/13/2018
I bought this because I hated the flat four pole that just hung over the bumper. Drilled a 1 7/8 inch hole in my bumper with bimetal hole saw. Mounted nice and clean. Be sure to hook up the White ground wire to your frame. The ground wire from the flat four does not pass thru this connector. Also if need be you can still pull a trailer with a flat four pole just by unpluging it
Carl M.
1/13/2019
It’s a year later. Still working great no problems
by: kurt k08/06/2013
Has been working great since purchased and installed 3 months ago. Used for several different trailers and long distance trips. Easy to install. Had to be slightly creative with the attachment of the ground. Did not see a reason to have a ground on this portion since everything else is already grounded, however would not work without grounding to the frame. Only used the four way connection and taped remaining three back. Hope for good things to come with this produce. Highly recommend this product.
Mike G.
6/17/2014
Had the same issue with the ground kurt. Almost gave up on it until I read your post. Thanks.
Sarah
10/8/2015
Thank you so much. Ours wasnt working either until we grounded it to car frame.
by: Scott 10/18/2022
Every phone encounter I’ve had with etrailer has been excellent. Their staff on the phones know their stuff and they have most every rv/trailer accessory known to man. The seven pole side is much more robust than the four pole side, which I leave connected all of the time. Problem solved
by: Rics4903/17/2014
This is a great product . The price was $18.00 dollars cheaper than some I found online. I have a 2002 dodge ram 1500 pickup, this adapter will change the 4 pole( which is made on my truck) to a 7 pole( which is on the trailer I will be using). The product connected, and bolted up to my truck bumper very easy. E trailer is the best.
Rics49
4/6/2015
Im still enjoying this product, Ive used it several times, still workingwell
by: B Kelly08/07/2017
Hitch was as advertised. The printed instructions made it a breeze. Took about an hour with me and an experienced mechanic. The light kit took a little longer than expected but was installed inside the car vice behind the lights like the video showed. Towing a camper this weekend, not expecting any issues.
B K.
8/10/2018
All is well. Don’t use it that often but when I needed it they’ve been there. I’ll use etrailer from now on.
by: Ben B. 10/18/2016
The website was extremely easy to use especially with the feature to pick my vehicles connection and my trailers connection. My purchase arrived very promptly and the customer service was excellent. The adapter works perfectly and I will definitely shop from etrailer again.
Ben B.
10/19/2017
I appreciate the follow-up. I must say that your company has provided an excellent customer service experience for me. I wish more companies cared as much. The product still works great. I use it when towing my trailer regularly.
by: MTKruger03/24/2014
We only discovered this site recently and LOVE it. You don't have to know what you want, the questions lead you to exactly what you are needing. The item is of great quality, and as described. We can now swap from truck to jeep with our trailer, and simply without effort.
We have found our new 'to go' store for our trailer shopping. Customer Service by the way, terrific, great communication, and very quick shipping. Really Great Experience, Highly recommend.
Mtkruger
3/24/2015
Weve moved in the past year, our new home 250 miles away from our old one. We used the hitch a lot, did I say a lot? daily round trips, never had a single problem with it. Worked like a champ. Thanks
by: Al N.05/17/2015
I was surprised how fast the shipping was and the price for the product was very reasonable. I did not mind that there was no mounting plate for the adapter because I wanted something that would hook up to the camper when I need to use it and then take it off afterwards. I know I will be coming to etrailer for any other trailer or camper needs that may come up.
Al N.
5/26/2016
could not be happier with the purchase that I made
by: Richard S.05/25/2019
Used this adaptor to replace the factory tow package flat 4-pin connector on my 2019 Toyota Highlander. It's sad that Toyota is still using a cheap flat 4-pin connector on their factory tow package for a vehicle rated to tow 5,000 LBS. Would it really have cost that much extra for them to just use a round 6- or 7-pin connector to begin with? The installation was pretty straightforward using a new mounting bracket for the round 7-pin connector in place of the existing 4-pin bracket. I hooked up the white ground wire to the mounting screw for the new bracket after sanding paint off the bracket and nut and using dielectric grease for the ground wire and 4-pin connections. Spent some time re-routing and zip-tying wires and taped up the 3 wires on the adaptor that I won't be using. Nice clean installation. Trailer running lights, turn signals and brake lights work great. A quality product delivered in a timely manner by etrailer.com.
by: Paul 10/05/2021
Super Service at ETrailer - I have never had an issue with the help provided or with any product
Paul
10/5/2022
Was easy to install. Fit perfect. Has stayed looking great. It is great having a mounting bracket for the electrical hookups. It keeps the 7pin more out of the way and more solid.
by: Bruce11/15/2021
Average quality part, would be nice to include a mount but ended up going the extra mile and used a hole saw to install it in my van’s bumper out of harms way. Would be easily damaged if mounted near the hitch.
by: ChiefHart12/09/2016
This RV receptacle works great for my set up. Most of the wires hooked to the Curt wiring harness connector. I installed a two wire cable from this to the front for 12Vddc and Electric brake control. I also hooked to my backup light to provide for my trailer back-up lights (LED).
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See what our Experts say about this Tow Ready Trailer Wiring
- Trailer Running Lights Not Working when Connected to 4-Way on 4 and 7-Way Trailer ConnectorThe trailer connector you are using on the vehicle needs to be grounded and the connector on the trailer has to be grounded as well. All of the lights also need to be grounded. This does sound like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside...
view full answer... - Wiring Adapter 4 Pole to 7 Pole Vehicle End Trailer ConnectorYou could wire the Tow Ready Adapter 4 Pole to 7 Pole # 30717 without the brake functions and just have the light functions on your tow vehicle without connecting the other wires. But I would be very cautious about not doing so for several reasons. The main reason is safety. The general rule for towing trailers with brakes is that if the Gross Trailer Weight is half of the Gross Vehicle Weight it is recommended to use a brake controller and have brakes on the trailer. Not being able to...
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- 4 pole to 7 adapter 2008 Toyota SiennaThe ground (white wire) definitely needs to be hooked up for your vehicle to power the lights on the trailer. You need to make sure the ground is mounted to a clean metal surface for a good connection. The black wire does not need to be hooked up if you do not have brakes or a battery to be charged while towing. Usually the extra black wire is for charging the trailer battery, the blue wire is for brakes and the heavy yellow wire is for auxilary power. You do not need to hook these...
view full answer... - Troubleshooting Trailer Running Light Circuit Not Working Using 4-Way to 7-Way AdapterSounds like the running light circuit of your trailer wiring is currently not working which is the circuit on the brown wire. This may be the adapter's fault but typically it's corrosion on trailer wiring pins that causes this type of problem so take sandpaper to the pins on the 4-way of your tow vehicle and the pins of the trailer's 7-way. If that doesn't work make sure the running light circuit along the trailer wiring is intact without any cuts or exposed wires and make sure the grounds...
view full answer... - Testing Wires On a 1994 Jeep Grand Cherokee to Determine Functions to Install a Trailer ConnectorYou cannot go by color because there is no standard for colors. You have to go by function only. To do this you will use a circuit tester like # 3808 and test the vehicle wires one at a time while someone sits in the vehicle and runs through all of the light functions. Then you can wire it all up following the functions (not colors) in the diagrams in the FAQ I have linked. On the trailer side, I assume the connector is fine. If the trailer is new then white is likely ground, brown is...
view full answer... - Adapting a 4-Pole Connector to a 7-Way Connector on a 2002 Nissan XterraIf you just need the light functions on the trailer to work then you can install a 4- to 7-Way adapter # 30717 on your 2002 Nissan Xterra. The white wire must be grounded to a clean metal surface for it to work. The remaining wires can be taped up and stowed out of the way.
view full answer... - How to Find Brake Switch Wire in a 1978 Ford F-100 for Brake Controller InstallationAre your vehicle brake lights still working when you press the brake pedal? If so, then it sounds like maybe you are testing the wrong circuit. It sounds like you could be installing a brake controller and are looking for the correct circuit to run to the stoplight circuit of the brake controller. If this is the case keep checking the circuits you found near the brake pedal till you find one that has 12 volts when the brakes are pressed and none when released. For more information on...
view full answer... - 4-Pole to 7-Pole Vehicle End Trailer Connector for Coleman Pop-up CamperI am sorry, we do not have a wiring diagram for this particular part, however we do have a Wiring FAQ that can help. I have included a link to it below. The white wire on the 4-pole connector is not active because the loose white wire overrides it. So the white wire coming off the adapter needs to be grounded. The 4-pole plug on the adapter needs to be plugged into the original 4-pole plug on the vehicle.
view full answer... - Will 2014 Hyundai Santa Fe 4-Way Connector Provide Charge to Trailer Battery Through 7-Way ConnectorRunning a 12 volt power circuit on your 2014 Hyundai Santa Fe would allow you to maintain the trailer battery but would not provide a way to charge the battery. As for the 4-way, this will only provide power for the lights and signals on your trailer. In order to actually charge the battery you will want to use a battery charger connected to a 110 outlet.
view full answer... - What is the Circuit that's on Center Pin of Trailer 6-Way and 7-WayOn a 6-way trailer connector the center is the 12 volt power source typically but on a 7-way it's the reverse light circuit. I attached diagrams for both connectors for you to check out as well.
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- How and Where to Wire the Four Loose Wires on the 4 Pole to 7 Pole Adapter, part # 30717The white wire is a ground and should be attached to the frame. The blue wire goes up to the blue wire on the brake controller. The black wire is a 12 volt power wire and is connected to the car battery. The orange or yellow wire can serve a few functions. It can be a reverse lockout for hydraulic brakes, it can be an auxiliary power supply, it can be used for reverse lights on a trailer, or if not needed, it can be taped out of the way. I attached an FAQ page on brake controller wiring...
view full answer... - Troubleshooting Trailer Lights That Flash with Blinkers and Don't work When Brakes are AppliedFirst thing I would do is check for corrosion in the 7-way of your 2004 Chevy Avalanche and clean as necessary. Most of the time this fixes situations like this. Aside from that the other most common problem is bad grounds on the trailer lights. You will want to make sure the grounds on the trailer light assemblies are connected to a clean metal surface. Also, the ground strap that runs from the trailer 4-way to the trailer frame needs to be connected to a clean metal surface. Aside from...
view full answer... - Does The Yellow Wire Coming For The Adapter 4 Pole to 7 Pole Have To Be AttachedThe yellow wire coming from the back of the 7-way connector on the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector part # 30717 is an auxiliary wire used for reverse lights or a reverse lockout. Therefore, no the yellow wire will not need to be attached in order for the trailer's tail lights to work.
view full answer... - 4-Way to 7-Way Wiring AdapterI would recommend the 4-way to 7-way Adapter, part # 30717. Keep in mind that although you will have lighting functions, the electric trailer brakes will not work unless the lead on the adapter for the brake output is installed to a brake controller.
view full answer... - Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector InstructionsSorry about that, I'll be happy to help! When connecting the adapter, (4 Pole to 7 Pole Vehicle End Trailer Connector), the white wire is your ground wire, the black is the hot wire to the 12V, the blue wire is to the electric brakes, and the yellow wire is for reverse. The 4 pole just plugs into the existing 4 pole.
view full answer... - Recommendation to Connect 7-Way on Trailer to 4-Way on 2016 Ford F-150If you are only needing to power the trailer's signal lights (not electric brakes or any other function), you will just want to install an adapter like the Tow Ready # 30717. This will plug right into the factory 4-Way on your 2016 F-150 and provide a 7 pole round plug to connect to your trailer. This will allow all of the rear signal light functions on the trailer to work as they should in correspondence with your truck. The extra wires can simply be tied off. I have included a short...
view full answer... - Will Running the 12 volt Accessory Wire from a 7-way to a Trailer Battery Overcharge itThe battery charging method that you described would not overcharge the battery of your trailer at all. Actually, at most it will put a very light maintenance charge on the battery to keep it topped off, but would not recharge the battery if it was fully discharged.
view full answer... - Which Circuits on a Trailer 7-Way are for the Turn SignalsCheck out the diagram attached that shows what each of the circuits on a 7-way are. The right turn will be the pin in the 3:00 position and the left turn will be the 9:00 position. It sounds like these circuits aren't making a solid connection.
view full answer...
- No Stop or Turn Signal Lights On Trailer When Using 4 to 7-Way AdapterIt sounds like you have an issue with the turn/brake signal circuit on either the vehicle or trailer. I recommend you first test this circuit on the vehicle side trailer connector. If you don't get power here then you most likely have a blown fuse or loose wire. If you do get power on the turn/brake signal circuit then apply a 12 volt hot lead to the trailer side trailer connector on the turn/brake signal circuit. Once this is done start testing the wire with a test light while working...
view full answer... - Trailer Lights are Not Working with 4-Way to 7-Way Adapter Plugged Into 2011 Ford EscapeFor the adapter # 30717 to function, the white wire has to be grounded to the vehicle frame. Without that ground it will not function. If it is properly grounded and you still do not have lights on the trailer, make sure that the adapter 7-Way and the trailer 7-Way pin configurations match up. I have included a link to our wiring FAQ article that shows diagrams of how various connectors should be pinned. If you are still not getting lights test the 4-Way on the vehicle with a circuit...
view full answer... - Does Yellow Wire of 4-Way to 7-Way Adapter part # 30717 Need to be ConnectedThe aux circuit of the # 30717 which is the yellow wire does not have to ran anywhere if the trailer does not need it. Typically this would run to the reverse light circuit if a back up light or reverse lockout solenoid was used. But for nearly all RV applications you don't have to connect that wire.
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- Troubleshooting 4-Way to 7-Way Adapter Where Circuits aren't Active But 4-Way Is GoodSounds like maybe the ground wire isn't connected properly if you are plugging in a known working 4-way to the # 30717 and you can't get the functions to work even with a tester. I'd make sure the white wire is connected to a clean metal surface on the vehicle frame and try again.
view full answer... - Does Blue and Yellow Wire of 7-Way to 4-Way Adapter # 30717 Need to be Wired InWhen installing the 4-way to 7-way adapter part # 30717 you only have to connect the circuits that you need. If your trailer does not have brakes and you don't need an auxiliary power source then those wires would not need to be connected to anything and could be taped up and out of the way.
view full answer... - Recommendation For Adapter For 4-Pole To 7-Pole Vehicle End Trailer ConnectorI have a great option for your situation. The Tow Ready Adapter 4-Pole to 7-Pole Vehicle End Trailer Connector, Item # 30717, will give you the ability to connect your vehicle to the trailer as well as the option to use only the functions you need. For any functions you are not using, simply tape up those wires in a bundle and store them away. After that, connect the ground, mount the connector, and your are good to go. I have attached a video for you to check out.
view full answer...
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Bruce
3/23/2023
its working well, no issues.